A runner is going at 7.3 ft/s when he decides to accelerate at 0.30 ft/s2. How long
will it take him to travel 0.250 mile? Please answer in seconds.
(use the quadratic equation to solve for time)
- oldprofLv 74 weeks ago
He'll cover D = UxT + 1/2 AT^2; so that .15T^2 + 7.3T - .250*5280 = 0 is the quad, which has the solution T = 72.58 seconds. ANS.